GNSS enhancement system suitable for tunnel environment

Abstract

The invention relates to the technical field of satellite navigation, in particular to a GNSS (Global Navigation Satellite System) enhancement system suitable for a tunnel environment, which comprises a time service unit, a GNSS base station transmitting unit, a remote control and supervision platform, a management and control center, a time service antenna, a transmitting antenna and a power supply unit, the navigation signal is radiated to a tunnel space through a navigation signal transmitting antenna; the remote control and monitoring platform mainly completes three aspects of contents: on one hand, remote parameter configuration of each transmitting platform of a subsystem is realized; continuous positioning inside and outside the tunnel is achieved under the condition that navigation signals are not changed, time synchronization control between base stations of a system in the tunnel is effectively achieved, the real-time performance of system supervision and signal parameters is effectively improved, the navigation positioning function of the environment in the tunnel is achieved, high-precision indoor time service is further provided, and the service life of the system is prolonged. And new positioning feasibility is provided for the environment in the tunnel.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a GNSS augmentation system suitable for tunnel environments. Background technique [0002] With the improvement of people's living standards, people put forward higher requirements for information services. In the field of location services, the GNSS navigation system can usually meet the high-precision positioning and location-based application services outdoors of the crowd. However, due to the GNSS system diagram In the case of shadowing in the space area, it is generally difficult to receive navigation signals, especially in indoor spaces and tunnel spaces. In the past two years, people have put forward higher requirements for the continuity of real-time positioning between tunnels and outdoors. Continuous outdoor and tunnel positioning can be realized without changing the positioning terminal. There are two existing tunnel positioning technologies, one is radar...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of people's living standards, people put forward higher requirements for information services. In the field of location services, the GNSS navigation system can usually meet the high-precision positioning and location-based application services outdoors of the crowd. However, due to the GNSS system diagram In the case of shadowing in the space area, it is generally difficult to receive navigation signals, especially in indoor spaces and tunnel spaces. In the past two years, people have put forward higher requirements for the continuity of real-time positioning between tunnels and outdoors. Realize continuous outdoor and tunnel positioning without changing the positioning terminal

There are two existing tunnel positioning technologies, one is radar ultrasonic positioning, which has poor positioning accuracy and has restrictive layout conditions; the other is positioning based on vision and inertial assistance, when there is no characteristic information in the tunnel, Error accumulation will increase rapidly, resulting in invalid positioning

Both methods are currently immature and are still under further study

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